Resistance unit



L. P. HYNES.

RESISTANCE UNIT.

APPLICATION mu) lULYI3, 1921.

Patented May 9, 1922.

avwmtoz roy Patent 982,7 35

LEE P. HYNES, OI ALBANY, NEW YORK,

ASSIGNOR 'IO CONSOLIDATED GAR-HEATING COMPANY, OF ALBANY, NEW YORK, ACORPORATION OF VIRGINIA RESISTANCE UNIT.

' Application filed July 13,

To all whom it may concern Be it known that I, LEE P. HYNES a. citizenof the United States, residing at lbany, in the county of Albany andState ofNew York, have invented certain new and useful Improvements inResistance Units, the following being a full, clear, and exactdisclosure of the one form of my invention which I at present deempreferable.

For a detailed description of the present form of my invention,reference may be .had to the following specification and to theaccompanying drawings forming a part thereof, wherein Figs. 1 and 2 areside porcelain core.

Fig. 3 is aside and end View of the endcap.

Fig. 4 shows the completed unit.

Fig. 5 is a modification and Fig. 6 a detail.

My invention relates such as are adapted to be received by spring clipslike those commonly employed for fuses. lit resides in certainarrangements forjsecuring a better, stronger and more sightly connectionof the resistance wire with the terminal caps at each end and aprotection for such connection.

T have illustrated my invention as applied to a resistance of the formshown in McElof Jan. 24th, 1911, wherein an asbestos cord on which afine resistance wire is closely wound, is coiled on a helically groovedrefractory core preferably of porcelain.

Referring to Fig. 4:, A represents the asbestos cord on which the finewire D is closely wound. The cord is coiled on a grooved porcelain coreB, which is shown separately in Figs. 1 and 2. To the core B, I add ateach end a cylindrical extension G into and across which the groove 6 ofthe core is continued somewhat diagonally. The groove is madeconsiderably deeper where it and end a... of the traverses the saidextension so that the coil which follows the groove, and lies normallyon the outside of the core, is brought down below the level of the coresurface at the extension C. Over said extension C and thewire-surrounded cord A. embedded therein, is passed a metal cap E ofcylindrical form, which is secured to the porcelain by being bent intoeach end of a hole K which passes Specification of Letters Patent.

. this being used when to resistance units 7 provided with. metallicends Patented May 9, 1922. 1921. Serial at. 484,405.

diametrically through the extension C. At 7 one .point in the flat faceof the cap a lip e Isstruck up from the metal and a copper wire G iswound over wire D on cord A (see F 1g. 6) to make a good connectiontherewith, and its terminal then wound around the said lip e. presseddown flush with the face of cap E, belng soldered if desired. All thatpart of cord A, Whereon wire G, is wound-comes under the cap E, beingsecured by the bend of the cord and by the-cap. That relieves all stresson the copper wire G and keeps it confined in place on'the cord.Moreover the concealment of the connection gives a neat The lip is thenand workmanlike appearance to the completed unit while insuring theconnection between resistance wire D and the terminal cap In Fig. 5 Ihave shown a wire coil without the presence of the asbestos cord A, thewire D is of a larger size. In that case the connecting copper wire Grnay be wound around the individual turns of the coil or may be omittedand the wire D itself wound on the lip e.

What I claim as new and desire to secure by Letters Patent isz' l. A.resistance unit comprising refractory core on which the resistance wireis wound and an extension thereof, together with a metallic terminal-dapembracing said extension and the end of said resistance wire andconnected electrically to said wire at a point inside the contactsurface of the cap.

2. A resistance-unit comprising a refractory core and extensions thereofprovided with a helical groove that is deeper at the extension-s, a coilof resistance wire laid in said groove and vmetallic caps,.embracingsaid extensions and the coils therein and connected coil.

3. A resistance-unit comprising a refractory core and extensions thereofprovided with a helical groove that is deeper at the extensions, arefractory cord wound with resistance'wire laid in said groove and C011.tinned into the deeper parts of the groove in the said extensions, andmetallic caps con nected electrically to the ends of said resisttanceWire and embracing said extensions and the wire-wound cord therein. a

4:. A resistance-unit comprising a refractory core, a resistance wirethereon and metallic end caps on said core provided with respectively tothe two ends of the c wound.

6. A resistance-unit comprising a refractory core, a resistance wirethereon and hollow metallic caps embracing the ends of the core and thewire thereon and provided with lips struck up from the ends of said capsaround which are wound wires forming the electrical terminals of saidresistance wire.

7 A resistanceunit comprising a refractory core and extensions formedwith a hellcal groove, a coil of resistance wire in said groove,metallic end caps embracing said extensions and the coil ends thereinand intermediate wires connecting the ends of the resistance wire to therespective caps.

8. A resistance-unit comprising a refractory core helically grooved, aresistance coil in said groove and end caps, embracing the ends of thecore and the coils thereon and connected electrically to the respectiveends of the coil with a depressed portion of the caps entering anopening in the core to retain them in position.

Signed at Albany, county of Albany, $313? of New York, this 9th day ofJuly,

LEE P. HYNES.

